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1·The chroma and pollution index obviously receded.

处理后废液色度、污染指数明显降低。

2·The accurate rate of pollution index forecast reaches 76%.

污染指数的预报准确率达76%。

3·Before you go outside to play always check the pollution index.

那你在出去玩之前，一定要经常检查空气污染指数。

4·The key link of treating heavy oil sewage is pollution index-COD attaining standard.

稠油废水处理的达标外排，其中处理的关键污染指标为COD （化学需氧量）。

5·The problem is so bad that CNBC Asia even carries a pollution index with its weather reports.

这个问题如此严重，以至于cnbc亚洲台在天气预报中加入了污染指数。

6·Each pollution index can reach the air environment quality level-2 standard (GB3095 -1996).

各污染指标可满足环境空气质量(GB3095—1996)中二级标准。

7·Nitric nitrogen in greenery vegetable exceed level I standard, pollution index is up to 3.50;

叶菜类中硝酸盐含量均超过一级标准，污染指数高达3.50，污染最重；

8·The pollution index topped 100 at all three of the city’s roadside monitoring stations today, as it has every day since Dec. 20.

今天市区所有三个路边监测站的污染指数均已超过了100，从12月20日以来天天如此。

9·The author made a research on counting method of dissolved oxygen pollution index and compared it with other counting methods.

本文对溶解氧污染指数计算方法进行了研究，并与其它各种计算方法进行了比较。

10·The results showed that the method of tendency weight pollution index is accurate and convenient for the assessment on water bodies.

并通过实例与均值污染指数法进行了比较，结果证明，趋势权重指数法评价水体质量准确、简便。